Networking Tutorials: Wi-Fi, IP, DNS, and Ethernet
Understand home and small-office networking, with practical Windows IP, DNS, Wi-Fi, router, and Ethernet checks.
Networking guides
How to Find Your IP Address in WindowsFind your local Windows IP address in Settings or with ipconfig, and understand how it differs from a public IP.
How to Flush the DNS Cache in WindowsClear the local Windows DNS resolver cache with ipconfig /flushdns when troubleshooting name-resolution issues.
2.4 GHz vs 5 GHz Wi-Fi: Which Band Should You Use?Compare 2.4 GHz and 5 GHz Wi-Fi by range, interference, device compatibility, and practical placement.
How to Restart a Wi-Fi Router SafelyRestart a home router in the right order and distinguish a reboot from a factory reset.
Ethernet Connected but No Internet: What to CheckTroubleshoot a Windows Ethernet connection with no internet by checking cable, link, IP assignment, and router status.
What Is DHCP?How IP addresses are assigned automatically.
TCP/IP ExplainedThe layers, TCP versus UDP and common ports.